Issue #12196: Add pipe2() to the os module.
diff --git a/Doc/library/os.rst b/Doc/library/os.rst
index 6ef6d9d..c62a00d 100644
--- a/Doc/library/os.rst
+++ b/Doc/library/os.rst
@@ -1019,6 +1019,19 @@
Availability: Unix, Windows.
+.. function:: pipe2(flags=0)
+
+ Create a pipe with *flags* set atomically.
+ *flags* is optional and can be constructed by ORing together zero or more of
+ these values: :data:`O_NONBLOCK`, :data:`O_CLOEXEC`.
+ Return a pair of file descriptors ``(r, w)`` usable for reading and writing,
+ respectively.
+
+ Availability: some flavors of Unix.
+
+ .. versionadded:: 3.3
+
+
.. function:: posix_fallocate(fd, offset, len)
Ensures that enough disk space is allocated for the file specified by *fd*